Hydor 75w Hydrokable Substrate Heater, 25' - for Aquariums 32-53 gal

This heater does at it is supposed to--heat via substrate. My big complaint is that it did not come with nearly enough suction cup attachments. I have a 55G tank and looping/winding the cable the way you're supposed to only half the tank was secured. It was basically impossible to find other suction cups for it. I had to order them from the company at a pretty ridiculous price--and even then predictably some of them didn't hold well. Fortunately they really only had to hold a couple minutes until I could get the sand/clay over it and then the weight of the substrate holds it down.

Got this for m 75gal planted tank, doesn't cone with near enough suction cups. Its plenty long enough to cover my whole tank and keeps the temp at 78 degrees.

Have had in my planted/ dirtied tank for a year. Has held up nicely in my 120 gallon. Keeps the substrate warm to improve circulation in the substate..

46 bow...with an internal heater working with it...78 is max temp. It is not adequate without assistance. If you want this as your main heater...try something else!

Heats my 75g tank from bellow easily and 2 years no issues.

Perfect more people need to use these I just wish I could find a 100 watt cable would buy again

only heat in 29 gl. tank works great. plants are thriving. highly recommended for planted aqaurim.

Using this in my planted 55 Gallon aquarium. Works perfect! Only issue I wish they included more suction cup fastners.

This cable really work, especially if it used under a sand first layer.For me, it was almost too hot, so you can aim for the higher bracket of the manufacturer claim of tank size.